Grassby reports to Leigh Lockwood:

Thanks for getting back to me.  Never knew Bob [Lockwood]that well, but the name rang a bell.  Needless to say, he died way too young.  My long-belated condolences.  One weekend, Eric Jurgensen (who went on to become Grupo Alfa's CFO),  Pepe Limantour (grandson of the infamous Limantour who was the main "cientifico" who advised the even more infamous Porfirio Diaz), and I were up in "Truchas" (just off the road to Toluca) at a motorcycle race.  From time to time the three of us did some racing there and elsewhere in Mexico.  By today's standards, our bikes (not to mention our helmets and non-existent body armor) were incredibly primitive but occasionally we did OK.  This particular time Bob had come up to watch.  He'd just gotten a new motorcycle and wanted to show it off but was still a bit unsure on it.   At one point, riding around, he lost control y se atropelló a un pobre fotógrafo.  My recollection is he wound up buying the guy a new camera.   Of course, at the time, we all thought it was hilarious.  In retrospect, for Bob and the photographer, it was anything but.  How cruel we all could be at that callow age.  

and (with apologies to Jurgenson)

I had no idea Bob [Lockwood} dealt with epilepsy, nor do I think any of the others did either.  Yep, drugs & alcohol will do it....epilepsy or no epilepsy.  I've lost count of all my buddies from AHS/college/law school who've self-destructed that way over the years.

My best guess on the year is winter 1958-59.  That would have been Jurgensen's and Limantour's senior year, my junior year.  No, Jurgensen never had a Vespa.  In fact, he'd be quite insulted at the very thought.  Both he and Limantour had Jawas, neither of which was worth a shit, even by the vale madres standards of the day but, hey, what did we know.  At the time I recall I was riding a souped-up 250 cc Maico that was "very fast" (by the standards of the day, that is) but always breaking down.  Don't know about Jurgensen and Limantour, but more than half a century later I'm still loving riding---a 250 Honda dirt bike and a 1000 Suzuki V-Strom dual sport bike.  If we'd had bikes that fast back then, not sure any of us would still be around today.